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(11)

EP 3 673 527 A1

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(43) Date of publication: 01.07.2020 Bulletin 2020/27 (21) Application number: 18848406.7 (22) Date of filing: 21.08.2018

(51) International Patent Classification (IPC):  H01M 4/36(2006.01) H01M 4/525(2010.01) H01M 4/485(2010.01) H01M 4/62(2006.01) H01M 4/505(2010.01) H01M 10/052(2010.01) (86) International application number: PCT/US2018/047392 (87) International publication number: WO 2019/040533 (28.02.2019 Gazette 2019/09)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 22.08.2017 US 201762548882 P (71) Applicant: A123 Systems LLC Waltham, MA 02451 (US)	(72) Inventors: ZHOU, Weidong Waltham, Massachusetts 02451 (US) WANG, Lixin Waltham, Massachusetts 02451 (US) ZHOU, Fu South Grafton, Massachusetts 01560 (US) JOHNSON, Derek Fort Collins, Colorado 80525 (US) (74) Representative: Grey, Ian Michael et al Venner Shipley LLP 200 Aldersgate London EC1A 4HD London EC1A 4HD (GB)